too_many_sessions

Too many stream sessions for this account (error frame, then the socket closes).

WebSocket error frame.

Likely cause: More sessions than allowed per account.

What to do: Reuse one session.

Retry: Yes. Nothing happened (or it was a read), so repeat it, after Retry-After when present.

Listed under Streaming in Errors. Send the error’s requestId to support and we can find the request.